Multiple spatiotemporal modes of actin reorganization by NMDA receptors and voltage-gated Ca2+ channels.

ABSTRACT: Cytoskeleton is believed to contribute to activity-dependent processes underlying neuronal plasticity, such as regulations of cellular morphology and localization of signaling proteins. However, how neuronal activity controls actin cytoskeleton remains obscure. Taking advantage of confocal imaging of enhanced GFP-actin in the primary culture of hippocampal neurons, we show that synaptic activity induces multiple types of actin reorganization, both at the spines and at the somatic periphery. Activation of N-methyl-d-aspartate receptors, accompanied with a local rise in [Ca(2+)]i, was sufficient to trigger a slow and sustained recruitment of actin into dendritic spines. In contrast, opening of voltage-gated Ca(2+) channels rapidly and reversibly enhanced cortical actin at the somatic periphe

SUBMITTER: Furuyashiki T 

PROVIDER: S-EPMC137905 | biostudies-literature | 2002 Oct

REPOSITORIES: biostudies-literature